A template-directed synthetic approach to halogen-bridged mixed-valence platinum complexes has been performed in organic media using, for instance, a syntheticpeptide bearing two bis(ethylenediamine)-based Pt(IV) complexes with two axial bromide anionic ligands, [(Pt(IV)Br2(en))2](RSO3)4, and a [Pt(II)(en)2](RSO3)2 complex (R = (C12H25OCH2)2CHO(CH2)3-).
A long-chain dialkylated olefin, 2C18 was found to form a close-packed, highly insulating self-assembled monolayer (SAM) on Si(111) via Si–C bond formation. The IR absorption spectra of the 2C18-SAM show that the alkyl chains are densely packed with an all-trans conformation. The threshold voltage to initiate the scanned probe oxidation (SPO) of the 2C18-SAM-covered Si(111) was ca. 9 V, which is much higher than the previously reported voltages for organic monolayers on Si or SiO2/Si substrates.
POLYGLYCERIN DIALKYL OR ALKENYL ETHER, AND COSMETIC COMPOSITION CONTAINING SAME
申请人:Daicel Corporation
公开号:EP2813483A1
公开(公告)日:2014-12-17
Provided are: a novel polyglycerol di-(alkyl/alkenyl) ether that is useful as a highly hydrophilic gemini surfactant; and a cosmetic composition containing the polyglycerol di-(alkyl/alkenyl) ether. The polyglycerol di-(alkyl/alkenyl) ether is represented by Formula (1), where R1 and R2 are identical or different and are independently a straight- or branched-chain alkyl group or a straight- or branched-chain alkenyl group, where the alkyl group may have one or more hydroxyl groups; and n indicates a number of glycerol units and is an integer of 2 or more. Formula (1) is expressed as follows: